Blasting through the skies to Nine Inch Nails "We're In This Together," the Avengers have finally fully assembled in their brand-new trailer. Watch Captain America fight with Iron Man, get your first look at the new mean green Hulk, and hear your first Whedonism.

Did you catch that little quip at the very end? Classic Joss Whedon delivery. And it's no real surprise here that Whedon's bantery humor fits Robert Downey Jr. like a glove.

The Avengers will open in theaters May 4th 2012. Watch it in HD over at Apple Trailers.